Tanker cleaning system

Abstract

This utility model discloses a tank truck cleaning system, including a tank truck, a water pump, an air compressor, and a precision filter. A flash steam generator is installed on one side of the tank truck and connected to the tank truck via a pipeline. The water pump is located at the bottom of the flash steam generator, and the water inlet of the water pump is connected to the bottom outlet pipe of the flash steam generator via a pipeline. The air compressor is located on one side of the flash steam generator, and the air outlet of the air compressor is connected to the tank truck via a pipeline. The precision filter is connected to the pipeline. Considering the significant differences in the physicochemical properties of the materials transported by the tank truck, the system employs different cleaning methods. For solvents that are difficult to dissolve in water, substances that are soluble in water, and substances that are easily soluble in water, steam cleaning, steam condensate cleaning, and production water cleaning are used respectively, along with corresponding subsequent treatment steps. This system can thoroughly remove residual substances from the tank truck, saving energy and achieving ideal cleaning results, ensuring that the cleanliness of the tank truck meets the requirements for subsequent material transportation.

Description

Technical Field

[0001] This utility model belongs to the field of tank truck cleaning technology, and specifically relates to a tank truck cleaning system. Background Technology

[0002] As a core component of new energy vehicles, the technological innovation and capacity expansion of power batteries have become key drivers of industry development. In the production process of power batteries, N-methylpyrrolidone (NMP) has become an indispensable solvent in the preparation of lithium battery cathode materials due to its excellent solubility. In the transportation of materials such as NMP, tank trucks play an important role as a commonly used means of transportation.

[0003] Currently, during the transportation of materials such as NMP by tank trucks, metal particles contained in the tank trucks can remain in the positive electrode material of lithium batteries. These metal particles accumulate in the positive electrode material and may puncture the separator between the positive electrode material and the electrolyte, causing a short circuit inside the lithium battery. This leads to rapid heating of the battery and, in severe cases, even fires and explosions. Therefore, tank trucks need to be cleaned before transporting materials such as NMP. However, tank truck cleaning generally uses a single method of steam cleaning, and afterwards, manual entry is required to wipe away residual moisture. This cleaning technology has certain drawbacks. In terms of cleaning solutions, due to the wide variety of materials transported by tank trucks and their vastly different physicochemical properties, some water-soluble or easily soluble substances are difficult to completely remove by steam cleaning. This is both energy-intensive and does not achieve the desired cleaning effect. Furthermore, it is not possible to use different cleaning methods for different media, making the operation inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a tanker truck cleaning system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tanker truck cleaning system, comprising:

[0006] A tank truck, wherein a flash steam generator is provided on one side of the tank truck and the flash steam generator is connected to the tank truck through a pipeline, for cleaning the tank truck with steam from the flash steam generator;

[0007] A water pump, wherein the water pump is located at the bottom of the flash steam engine and the water inlet of the water pump is connected to the water outlet pipe at the bottom of the flash steam engine through a pipe, is used to pump the condensate in the bottom of the flash steam engine into the tank truck for cleaning the tank truck.

[0008] An air compressor, wherein the air compressor is located on one side of the flash steam generator and the air outlet of the air compressor is connected to the tank truck through a pipe, for use in drying the cleaned tank truck;

[0009] A precision filter, which is connected to a pipeline, is used to filter liquids and gases entering the tanker.

[0010] Preferably, the top side of the flash steam generator is connected to the top cover of the precision filter via a first connecting pipe, and the bottom of the precision filter is connected to a second connecting pipe, one end of which is connected to two sets of branch pipes. One end of each branch pipe is connected to two sets of cleaning port flanges provided on the top of the tank truck.

[0011] Preferably, the water pump outlet is connected to the first connecting pipe via a third connecting pipe, and the air compressor outlet is connected to the first connecting pipe via a fourth connecting pipe.

[0012] Preferably, the first connecting pipe, the second connecting pipe, the third connecting pipe, and the fourth connecting pipe are all equipped with solenoid valves.

[0013] Preferably, the first connecting pipe is sequentially connected to a water inlet for connecting to production water, a nitrogen inlet for connecting to a nitrogen pipeline, and an NMP finished product inlet for connecting to an NMP finished product pipeline.

[0014] Preferably, the top cover is connected to the top of the precision filter via a flange, and the precision filter contains several partitions, with several filter elements fixed inside the partitions by bolts.

[0015] Preferably, the tanker truck has a discharge port on one side of its bottom.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) In view of the significant differences in the physical and chemical properties of the materials transported by tank trucks, the system adopts different cleaning methods. For solvents that are difficult to dissolve in water, substances that are soluble in water, and substances that are easily soluble in water, steam cleaning, steam condensate cleaning, and production water cleaning are used respectively. With the corresponding follow-up treatment steps, the residual substances in the tank truck can be thoroughly removed. Compared with the traditional single steam cleaning method, it avoids the problem of incomplete cleaning of some substances, saves energy, achieves ideal cleaning effect, and ensures that the cleanliness of the tank truck meets the requirements of subsequent material transportation.

[0018] (2) After cleaning, nitrogen is introduced into the tank truck through the nitrogen port for nitrogen sealing, which isolates the inside of the tank truck from the outside air. This effectively protects the cleaned tank truck from secondary pollution caused by contact with the outside air. In addition, the precision filter can filter the cleaning medium entering the tank truck to prevent the introduction of new particles during the cleaning process. This further ensures the clean environment inside the tank truck and provides a safe and reliable container for subsequent material transportation, reducing the risk of material deterioration or product quality problems caused by tank truck contamination.

[0019] (3) After cleaning inside the tank truck, the air compressor blows air into the tank truck through the fourth connecting pipe to dry the cleaning medium inside the tank truck, which greatly shortens the cleaning time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the flash steam generator of this utility model;

[0022] Figure 3 This is a schematic diagram of the air compressor of this utility model;

[0023] Figure 4 This is a cross-sectional view of the precision filter of this utility model.

[0024] In the diagram: 1. Tank truck; 2. Flash steam generator; 3. Water pump; 4. Air compressor; 5. Air outlet; 6. First connecting pipe; 7. Second connecting pipe; 8. Branch pipe; 9. Cleaning port; 10. Third connecting pipe; 11. Fourth connecting pipe; 12. Solenoid valve; 13. Water inlet; 14. Nitrogen inlet; 15. NMP finished product inlet; 16. Top cover; 17. Partition plate; 18. Filter element; 19. Discharge port; 20. Water outlet pipe; 21. Precision filter. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] This utility model provides, for example Figure 1-4 The tanker cleaning system shown includes:

[0028] Tank truck 1, wherein a flash steam generator 2 is provided on one side of the tank truck 1 and the flash steam generator 2 is connected to the tank truck 1 through a pipeline, for cleaning the tank truck 1 by using the steam in the flash steam generator 2;

[0029] Water pump 3, which is located at the bottom of flash steam engine 2 and whose inlet end is connected to the outlet pipe 20 at the bottom of flash steam engine 2 through a pipe, is used to pump the condensate in the bottom of flash steam engine 2 into tank truck 1 to clean tank truck 1.

[0030] Air compressor 4, the air compressor 4 is located on one side of flash steam engine 2 and the air outlet 5 of air compressor 4 is connected to tank truck 1 through a pipe, used to dry the cleaned tank truck 1;

[0031] A precision filter 21 is connected to a pipeline and is used to filter liquids and gases entering the tank truck 1.

[0032] The top side of the flash steam generator 2 is connected to the top cover 16 of the precision filter 21 via the first connecting pipe 6. The bottom of the precision filter 21 is connected to the second connecting pipe 7, and one end of the second connecting pipe 7 is connected to two sets of branch pipes 8. One end of the branch pipe 8 is connected to the flanges of two sets of cleaning ports 9 provided on the top of the tank truck 1.

[0033] The outlet of the water pump 3 is connected to the first connecting pipe 6 through the third connecting pipe 10, and the air outlet 5 of the air compressor 4 is connected to the first connecting pipe 6 through the fourth connecting pipe 11.

[0034] Solenoid valves 12 are installed on the first connecting pipe 6, the second connecting pipe 7, the third connecting pipe 10, and the fourth connecting pipe 11. In the tank truck cleaning system, different cleaning methods are switched by precisely controlling the solenoid valves 12 on the first to fourth connecting pipes 11. When cleaning water-insoluble solvents, the solenoid valves 12 on the first connecting pipe 6 and the second connecting pipe 7 are opened during the steam cleaning stage, while the other solenoid valves 12 are closed. The solenoid valve 12 on the second connecting pipe 7 is opened during the NMP replacement and nitrogen sealing stages. When cleaning water-soluble substances, the solenoid valves 12 on the third connecting pipe 10 and the second connecting pipe 7 are opened during the steam condensate cleaning stage, while the other solenoid valves 12 are closed. When cleaning water-soluble substances, the solenoid valves 12 on the fourth connecting pipe 11 and the second connecting pipe 7 are opened during the production water cleaning stage. The subsequent processing stages of each cleaning method, such as drying, finished product rinsing, and nitrogen sealing, adjust the state of the corresponding solenoid valves 12 as needed to ensure that the cleaning process is carried out efficiently and orderly.

[0035] The first connecting pipe 6 is sequentially connected to a water inlet 13 for connecting to production water, a nitrogen inlet 14 for connecting to a nitrogen pipeline, and an NMP finished product inlet 15 for connecting to an NMP finished product pipeline.

[0036] The top cover 16 is connected to the top of the precision filter 21 via a flange. Several baffles 17 are connected inside the precision filter 21, and several filter elements 18 are bolted to the baffles 17. This flange connection facilitates disassembly and installation. When it is necessary to inspect, maintain, or replace the filter elements 18 inside the precision filter 21, the operator can quickly disassemble the flange and open the top cover 16, greatly improving the convenience and efficiency of maintenance. The baffles 17 divide the interior of the filter into multiple chambers, causing the cleaning medium to flow in a tortuous path within the filter, extending the contact time between the medium and the filter elements 18. Furthermore, different media... When filtering NMP finished products or nitrogen, new filter element 18 can be replaced as needed. This gives the filter element 18 a greater chance to intercept impurity particles in the cleaning medium, significantly improving the filtration effect, ensuring the high cleanliness of the cleaning medium entering the tank truck, preventing the introduction of new contaminants, and providing a guarantee for high-quality cleaning operations. The filter element 18 is fixed in the partition 17 by bolts. This installation method is very convenient for the replacement and maintenance of the filter element 18. After a period of use, the filter element 18 will reduce its filtration efficiency due to the interception of a large number of impurities. At this time, simply unscrew the bolts to quickly remove the old filter element 18 and replace it with a new one.

[0037] The tank truck 1 has a discharge port 19 on one side of its bottom. After the steam, steam condensate, production water, NMP finished product, and nitrogen have completed the dissolution, rinsing, and nitrogen sealing of the residual substances in the tank truck 1, they can all be discharged through the discharge port 19. The discharge port 19 is equipped with a control valve, which can flexibly control the opening and closing status according to the cleaning progress and discharge requirements.

[0038] This tank truck cleaning system can use steam cleaning to clean substances that are difficult to dissolve in water (organic compounds, such as benzene, toluene, xylene, and other aromatic hydrocarbons) inside the tank truck. After the system is started by an external controller, the flash steam generator 2 enters the working state and uses efficient flash evaporation technology to quickly convert liquid water into high-temperature and high-pressure steam. This steam is transported through the first connecting pipe 6. Before entering the tank truck 1, it is filtered by the filter element 18 inside the precision filter 21. The filter element 18 adopts a multi-layer filter structure, which can effectively intercept rust, impurity particles, etc. that may be carried in the steam, ensuring that the steam entering the tank truck 1 is pure and free of impurities. After the filtered high-temperature steam enters the tank truck 1 through the second connecting pipe 7, the branch pipe 8, and the cleaning port 9, it impacts and dissolves the insoluble solvents remaining on the inner wall and corners of the tank truck 1 with its own heat and kinetic energy, initially breaking down stubborn stains, and then discharged through the discharge port 19.

[0039] After steam cleaning, the residual moisture is analyzed using high-performance liquid chromatography (HPLC) and a laser particle size analyzer. A sample is extracted from the residual moisture in tank truck 1 and injected into the HPLC to detect the types and contents of various solvents. The obtained residual moisture sample is then introduced into the detection cell of the laser particle size analyzer to detect the total particulate matter content in the residual moisture. This allows for the detection of solvent and particulate matter content in the residual moisture inside tank truck 1. When the test results meet the standard requirements, the air compressor 4 is activated via an external controller. The air compressor 4 compresses the outside air, which then flows through the outlet 5, the fourth connecting pipe 11, and into the first connecting pipe 6, where it is filtered by the precision filter 21. The filtered air then flows through the second connecting pipe 7, two sets of branch pipes 8, and the cleaning port 9 into tank truck 1. The clean compressed air filtered by the precision filter 21 is then delivered into tank truck 1. The gas flows rapidly inside and out through the discharge port 19, carrying away residual moisture and achieving a drying effect. After the tank truck 1 is dried, it can be connected to the NMP finished product pipeline through the NMP finished product interface 15. NMP (N-methylpyrrolidone), as a high-performance organic solvent, enters the tank truck 1 through the first connecting pipe 6 under pressure. Utilizing its miscibility with the residual substances, it dissolves the residues and carries them out through the discharge port 19. At the same time, after the NMP evaporates, a dry surface is formed inside the tank truck 1, thereby completely replacing the internal surface of the tank truck 1. NMP can further dissolve the residual trace amounts of insoluble solvents, ensuring that the inner wall of the tank truck is thoroughly cleaned. After the replacement is completed, the nitrogen interface 14 is connected to the nitrogen pipeline, and high-purity nitrogen is injected into the tank truck 1 at a stable flow rate. As the nitrogen is continuously injected, the air inside the tank truck is gradually discharged, eventually forming a nitrogen-filled sealed space, achieving nitrogen sealing and effectively preventing the entry of outside air and secondary pollution.

[0040] When cleaning water-soluble substances (slightly soluble salts such as calcium sulfate and magnesium carbonate, as well as organic compounds such as ethyl acetate):

[0041] As the steam generated by the flash steam generator 2 releases heat in the heat exchange device, it condenses into liquid water with a certain temperature. The steam condensate in the bottom of the flash steam generator 2 is driven by the water pump 3 and passes through the third connecting pipe 10 and the first connecting pipe 6 in sequence. After being filtered by the precision filter 21, it enters the tank truck 1 through the second connecting pipe 7 and the branch pipe 8. Since the steam condensate has a high temperature, it can significantly increase the solubility of substances in water, thereby efficiently dissolving and cleaning the water-soluble substances remaining in the tank truck. After the cleaning is qualified, the air compressor 4 is started to perform a drying operation. Its working principle is the same as the drying steps when cleaning insoluble solvents. After drying, the internal surface of the tank truck 1 is rinsed with NMP product to further remove any possible residual impurities. Finally, nitrogen sealing is performed through the nitrogen interface 14 to ensure a clean environment for the tank truck.

[0042] When cleaning substances that are easily soluble in water (in terms of organic compounds, such as ethanol (alcohol), methanol, and other alcohols):

[0043] The water inlet 13 connects to an externally installed production water pipeline. Under its own pressure or the action of an additional high-pressure water pump, the production water flows along the first connecting pipe 6, is filtered by the precision filter 21, and then flows rapidly into the tank truck 1 through the second connecting pipe 7 and the branch pipe 8. The production water flows fully in the tank truck 1, making full contact with the residual water-soluble substances to achieve rapid dissolution and cleaning. The wastewater after cleaning can be discharged through the discharge port 19. The subsequent drying, finished product rinsing, and nitrogen sealing steps are consistent with the corresponding steps in the cleaning process of the two materials mentioned above, ensuring the integrity of the cleaning process and the reliability of the cleaning effect. This allows different cleaning methods to be used for different media, saving energy and achieving the ideal cleaning effect.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tank car cleaning system, characterized by, include: Tank car (1), a flash steam generator (2) is provided on one side of the tank car (1) and the flash steam generator (2) is connected to the tank car (1) through a pipeline, for cleaning the tank car (1) with steam in the flash steam generator (2); Water pump (3), the water pump (3) is located at the bottom of the flash steam engine (2) and the water inlet of the water pump (3) is connected to the bottom outlet pipe (20) of the flash steam engine (2) through a pipe, for pumping the condensate in the bottom of the flash steam engine (2) into the tank truck (1) to clean the tank truck (1); Air compressor (4), the air compressor (4) is located on one side of flash steam engine (2) and the air outlet (5) of the air compressor (4) is connected to the tank car (1) through a pipe, for drying the cleaned tank car (1); A precision filter (21) is connected to a pipeline and is used to filter liquids and gases entering the tanker (1).

2. A tank car cleaning system according to claim 1 wherein: The top side of the flash steam generator (2) is connected to the top cover (16) of the precision filter (21) via the first connecting pipe (6). The bottom of the precision filter (21) is connected to the second connecting pipe (7), and one end of the second connecting pipe (7) is connected to two sets of branch pipes (8). One end of the branch pipe (8) is connected to the flanges of two sets of cleaning ports (9) provided on the top of the tank truck (1).

3. A tank car cleaning system according to claim 2 wherein: The outlet of the water pump (3) is connected to the first connecting pipe (6) through the third connecting pipe (10), and the air outlet (5) of the air compressor (4) is connected to the first connecting pipe (6) through the fourth connecting pipe (11).

4. A tank car cleaning system as defined in claim 3, wherein: Solenoid valves (12) are provided on the first connecting pipe (6), the second connecting pipe (7), the third connecting pipe (10), and the fourth connecting pipe (11).

5. A tank car cleaning system according to claim 4 wherein: The first connecting pipe (6) is sequentially connected to a water inlet (13) for connecting to production water, a nitrogen inlet (14) for connecting to a nitrogen pipeline, and an NMP finished product inlet (15) for connecting to an NMP finished product pipeline.

6. A tank car cleaning system according to claim 2 wherein: The top cover (16) is connected to the top of the precision filter (21) by a flange. The precision filter (21) has several partitions (17) connected inside, and several filter elements (18) are fixed inside the partitions (17) by bolts.

7. A tank car cleaning system according to claim 1 wherein: The tanker (1) has a discharge port (19) on one side of its bottom.

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